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77379-98-7

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77379-98-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77379-98-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,3,7 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 77379-98:
(7*7)+(6*7)+(5*3)+(4*7)+(3*9)+(2*9)+(1*8)=187
187 % 10 = 7
So 77379-98-7 is a valid CAS Registry Number.

77379-98-7Relevant articles and documents

SYNTHESIS AND PROPERTIES OF 7,7-DIAMINOQUINONE METHIDES

Pavlickova, Libuse,Vasickova, Sona,Soucek, Milan

, p. 2675 - 2683 (2007/10/02)

Diaminoquinone methides Xa-Xe were prepared by aminolysis of the dicyanoquinone methide IX.From the isolated intermediates XI and XIII a four-step mechanism was deduced, involving addition and elimination steps in the order Ad-E-Ad-E.Condensation of N,N,N',N'-tetramethylchloroformamidinium chloride with 2,6-ditert-butylphenol afforded bis(dimethylamino)-quinone methide Xc which on transamination was converted to the diaminoquinone methides Xa and Xb.Analysis of physico-chemical data of diaminoquinone methides leads to the conclusion that their structure can be represented by the zwitterionic formula XVII rather than the quinonoid formula X.

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